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公开(公告)号：US11673846B2
公开(公告)日：2023-06-13
申请号：US16271386
申请日：2019-02-08
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Tan-Jen Chen , Seth M. Washburn
CPC classification number: C07C2/66 , B01J29/0308 , B01J29/70 , B01J29/7038 , C07C2/864 , C07C2529/70 , Y02P20/52 , C07C2/864 , C07C15/08
Abstract: A process is described for producing paraxylene, in which an aromatic hydrocarbon feedstock comprising benzene and/or toluene is contacted with an alkylating reagent comprising methanol and/or dimethyl ether in an alkylation reaction zone under alkylation conditions in the presence of an alkylation catalyst to produce an alkylated aromatic product comprising xylenes. The alkylation catalyst comprises a molecular sieve having a Constraint Index≤5, and the alkylation conditions comprise a temperature less than 500° C. Paraxylene may then be recovered from the alkylated aromatic product.
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公开(公告)号：US11643375B2
公开(公告)日：2023-05-09
申请号：US17433040
申请日：2020-03-18
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Seth M. Washburn , Hsu Chiang , Tan-Jen Chen
CPC classification number: C07C2/865 , B01J29/7038 , C07C2/864 , C07C2529/70
Abstract: This disclosure provides improved processes for converting benzene/toluene via methylation with methanol/dimethyl ether for producing, e.g., p-xylene. In an embodiment, a process comprises contacting a methylation agent feed with an aromatic hydrocarbon feed in the presence of a methylation catalyst in a methylation reactor at increased pressure. Reduced methylation catalyst deactivation can be achieved with increased pressure in the methylation reactor.
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公开(公告)号：US11535578B2
公开(公告)日：2022-12-27
申请号：US16820227
申请日：2020-03-16
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Seth M. Washburn , Hsu Chiang , Umar Aslam , Wenyih Frank Lai , Doron Levin , Tan-Jen Chen
Abstract: This disclosure provides improved processes for converting aromatic hydrocarbons, such as benzene/toluene, alkylation, transalkylation, or isomerization. In an embodiment, a process comprises utilizing a passivated reactor to reduce deactivation of a molecular sieve catalyst. Additional measures such as the use of an auxiliary catalyst and/or an elevated reactor pressure may be used to further reduce deactivation of the molecular sieve catalyst.
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公开(公告)号：US20210171422A1
公开(公告)日：2021-06-10
申请号：US16071398
申请日：2017-02-10
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Jane C. Cheng , Darryl D Lacy , Scott J Seigel , Brandon J O'Neil , Tan-Jen Chen , Todd E Deetjen
Abstract: Methods and corresponding catalysts are provided for transalkylation of 1-ring (C9+) aromatic compounds, such as transalkylation to form para-xylene and/or other xylenes. Suitable catalysts include molecular sieves having a 3-D 12-member ring framework structure, molecular sieves having a 1-D 12-member ring framework structure, acidic microporous materials with a pore channel size of at least 6.0 Angstroms, and/or molecular sieves having a MWW framework structure. The methods include performing transalkylation where at least a portion of the feed to the transalkylation process is in the liquid phase. Optionally, the transalkylation conditions can correspond to conditions where a continuous liquid phase is present within the reaction environment. Some embodiments include liquid phase transalkylation processes for naphthalene-containing feedstock streams.
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公开(公告)号：US10246383B2
公开(公告)日：2019-04-02
申请号：US15702337
申请日：2017-09-12
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Tan-Jen Chen , Seth M. Washburn
Abstract: A process is described for producing paraxylene, in which an aromatic hydrocarbon feedstock comprising benzene and/or toluene is contacted with an alkylating reagent comprising methanol and/or dimethyl ether in an alkylation reaction zone under alkylation conditions in the presence of an alkylation catalyst to produce an alkylated aromatic product comprising xylenes. The alkylation catalyst comprises a molecular sieve having a Constraint Index ≤5, and the alkylation conditions comprise a temperature less than 500° C. Paraxylene may then be recovered from the alkylated aromatic product.
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Patent Agency Ranking
公开(公告)号：US20180273457A1
公开(公告)日：2018-09-27
申请号：US15742910
申请日：2016-06-17
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Jihad M. Dakka , Ashley J. Malik , Christopher L. Becker , Jason D. Davis , Kirk C. Nadler , Jose M. Vargas , Tan-Jen Chen , Seth M. Washburn , Jörg F.W Weber
CPC classification number: C07C45/006 , C07C37/74 , C07C45/82 , C07C2601/14 , Y02P20/52 , C07C49/403 , C07C39/04
Abstract: Disclosed are novel processes for making cyclohexanone compositions, from a mixture comprising phenol, cyclohexanone, and cyclohexylbenzene. The process includes hydrogenation of a feed stream comprising phenol, cyclohexanone, and cyclohexylbenzene. The feed stream may be subjected to one or more pre-hydrogenation treatments, such as passing through one or more sorbents, addition of basic chemical agents, and/or addition of water, so as to improve catalyst activity, minimize undesired side reactions, and/or remove catalyst poisons from the feed stream. The feed stream may be provided to a hydrogenation reaction zone in the vapor phase, with periodic alterations to hydrogenation reaction conditions such that the feed is provided in mixed liquid and vapor phase in order to carry out liquid washing of a hydrogenation catalyst bed within the hydrogenation reaction zone.
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公开(公告)号：US20180194705A1
公开(公告)日：2018-07-12
申请号：US15743367
申请日：2016-06-17
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Jihad M. Dakka , Ashley J. Malik , Christopher L. Becker , Jason D. Davis , Kirk C. Nadler , Jose M. Vargas , Tan-Jen Chen , Seth M. Washburn , Jörg F.W. Weber
CPC classification number: C07C45/006 , B01J8/06 , B01J23/44 , B01J23/58 , B01J23/96 , B01J35/008 , B01J38/04 , B01J38/06 , B01J38/10 , B01J38/12 , B01J38/50 , B01J38/52 , B01J38/56 , B01J38/64 , B01J2219/00081 , B01J2219/00162 , C07C2/74 , C07C37/001 , C07C49/403 , C07C407/00 , C07C2601/14 , Y02P20/584
Abstract: Disclosed are novel processes for making cyclohexanone compositions, from a mixture comprising phenol, cyclohexanone, and cyclohexylbenzene. The process includes hydrogenation of a feed stream comprising phenol, cyclohexanone, and cyclohexylbenzene. The feed stream may be subjected to one or more pre-hydrogenation treatments, such as passing through one or more sorbents, addition of basic chemical agents, and/or addition of water, so as to improve catalyst activity, minimize undesired side reactions, and/or remove catalyst poisons from the feed stream. The feed stream may be provided to a hydrogenation reaction zone in the vapor phase, with periodic alterations to hydrogenation reaction conditions such that the feed is provided in mixed liquid and vapor phase in order to carry out liquid washing of a hydrogenation catalyst bed within the hydrogenation reaction zone.
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公开(公告)号：US09555403B2
公开(公告)日：2017-01-31
申请号：US14403806
申请日：2013-07-09
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Gabor Kiss , Tan-Jen Chen , Thomas E. Green
CPC classification number: B01J29/7476 , B01J37/18 , B01J38/10 , B01J38/56 , B01J2229/42 , C07C2/74 , C07C2529/74 , C07C2601/14 , Y02P20/584 , C07C13/28
Abstract: A process for activating a hydroalkylation catalyst in a first state comprising an acid component and a hydrogenating metal component, including: (i) treatment at a temperature of at least 120° C. in the presence of hydrogen for a first duration to produce a catalyst in a second state having a first hydroalkylation activity; (ii) contacting the catalyst in the second state with an aromatic compound and hydrogen under a hydroalkylation condition effective to convert at least part of the aromatic compound to a cycloalkylaromatic compound and produce a catalyst in a third state; and (iii) treating the catalyst in the third state at a temperature of at least 160° C. in the presence of hydrogen but advantageously in the substantial absence of the aromatic compound for a third duration to produce an activated catalyst in a fourth state having a third hydroalkylation activity greater than the first hydroalkylation activity.
Abstract translation: 一种在包含酸组分和氢化金属组分的第一状态下活化加氢烷基化催化剂的方法，包括：（i）在氢存在下在至少120℃的温度下处理第一段时间以产生催化剂 在具有第一加氢烷基化活性的第二状态下; （ii）在有效将至少部分芳族化合物转化为环烷基芳族化合物并产生第三种状态的催化剂的加氢烷基化条件下使第二状态的催化剂与芳族化合物和氢气接触; 和（iii）在氢气存在下在至少160℃的温度下处理第三状态的催化剂，但有利地基本上不存在芳族化合物持续第三个时间，以产生具有第四状态的活化催化剂，其具有 第三加氢烷基化活性大于第一加氢烷基化活性。
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公开(公告)号：US09364823B2
公开(公告)日：2016-06-14
申请号：US14424832
申请日：2013-10-03
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Gabor Kiss , Christopher L. Becker , Tan-Jen Chen , Thomas E. Green
IPC: C07C45/53 , C07C31/08 , C07C2/66 , B01J29/00 , B01J37/18 , B01J37/08 , B01J35/00 , B01J23/44 , B01J29/064 , B01J29/72 , B01J29/74 , C07C37/08 , C07C2/74 , C07C407/00 , B01J35/02 , B01J37/00 , B01J37/02 , C07C29/04
CPC classification number: B01J37/18 , B01J23/44 , B01J29/064 , B01J29/7276 , B01J29/7476 , B01J35/0006 , B01J35/023 , B01J35/026 , B01J37/0009 , B01J37/0201 , B01J37/08 , C07C2/66 , C07C2/74 , C07C29/04 , C07C37/08 , C07C45/53 , C07C407/00 , C07C2529/70 , C07C2529/74 , C07C2601/14 , Y02P20/52 , C07C409/14 , C07C13/28 , C07C39/04 , C07C49/403
Abstract: In a process for activating a hydroalkylation catalyst, a catalyst precursor comprising a solid acid component and a compound of a hydrogenation metal is heated at a heating rate of less than 50° C./hour in the presence of hydrogen to an activation temperature in a range from 100° C. to 260° C. and then the heated catalyst precursor is treated with hydrogen for a duration effective to reduce at least a portion of the metal compound to an elemental form.
Abstract translation: 在活化加氢烷基化催化剂的方法中，将包含固体酸组分和氢化金属化合物的催化剂前体在氢气存在下以小于50℃/小时的加热速率加热至活化温度 范围为100℃至260℃，然后用氢气处理加热的催化剂前体持续时间以有效地将至少一部分金属化合物还原成元素形式。
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公开(公告)号：US09353024B2
公开(公告)日：2016-05-31
申请号：US14165255
申请日：2014-01-27
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Tan-Jen Chen , John Di-Yi Ou , Jeevan S. Abichandani , Glenn Allen Heeter
CPC classification number: C07C7/163 , C07C2/864 , C07C2/865 , C07C5/03 , C07C5/05 , C07C2521/04 , C07C2523/44 , C07C15/073 , C07C15/08
Abstract: A feedstream comprising paraxylene and styrene is contacted, in the presence of hydrogen, with a catalyst comprising at least one metal, selected from one or more metals selected from Groups 8-10.
Abstract translation: 包含对二甲苯和苯乙烯的进料流在氢的存在下与包含至少一种选自第8-10族中的一种或多种金属的金属的催化剂接触。
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